OpenOffice is already a complete desktop office suite that is at par in terms of features with the proprietary Microsoft Office. However, its functionality can still be improved by utilizing useful extensions that are easily available.

Like in Firefox, OpenOffice will let you install or remove extensions without difficulty with the use of an Extension Manager.

Now if you are ready to try out some handy OpenOffice extensions, here are those that I highly recommend:

1. Writer's Tools

This is definitely one of my favorite extensions. Fully loaded with useful utilities, Writer's Tools is truly a must-have for professional and even for non-professional writers. Some of its impressive features are:Multi-format Backup tool saves the currently opened Writer document in the Word, RTF, and TXT formats.

* Email Backup tool can be used to quickly send a backup copy of the currently opened document to a specified email address.

* Lookup Tool lets you look up the currently selected word in several online references, including Cambridge Dictionaries, WordNet, and Google Define.

* Post to Microblog tool can be used to send messages to the Identi.ca and Twitter microblogging services.

This extension makes it possible to check for grammatical and language errors since OpenOffice doesn't have a grammar and language checker by default. It supports languages in English, German, Polish, Dutch, and much more. It is rule-based, which means it will find errors for which a rule is defined in its XML configuration files. Rules for more complicated errors can be written in Java. However, it does not include spell checking.

If you want to create professional-looking documents and presentations, then you must get this extension. This template pack contains more than 120 templates for Writer, Calc, and Impress. Some of the included templates are:

If you want to efficiently reduce the file size of your presentation, then this extension is for you. It can optimize the image quality size and remove data that is no longer needed in your presentation. The Sun Presentation Minimizer wizard summarizes all of the changes that will be made to your presentation, and then gives you an estimate of the file size reduction.

This extension is essential for those who are always on the go. It makes it possible to export, update, and import your documents to and from Google Docs, Zoho and WebDAV servers. With OOo2GD you may export to Google Docs, Zoho and WebDAV servers:

* Documents: ODT, SXW, DOC, RTF without modification, other known to OO.org after conversion to ODT

* Spreadsheets: ODS, XLS, CSV without modification, other known to OO.org after conversion to ODS

* Presentations: PPT, PPS without modification, other known to OO.org after conversion to PPT

This is simply a collection of 30 beautiful templates that you can use for your presentation to impress your teacher or your boss. The graphics by the way are based on open-source art. After installation, you can access the template by going to File -- > New --> Templates and Documents --> Templates --> My Templates.